Question 5 Save Ansv Several months after the initial vaccination schedule to achieve COVID immunity, the protection against COVID diminishes, and "boosters" are recommended to re-establish full immune protection. What is the part of the immune response that naturally wanes or diminishes during that time so that boosters are needed? a. Levels of circulating antibodies such as IgG decrease because of their usual half-life in the blood. b. The antigen processing dendrites stop working because they get tired of doing all that hard work and not getting proper recognition and credit. Oc. Natural killer cells lose their ability to recognize and kill virus-infected cells. Od. The memory B-cells lose the ability to remember the SARS-CoV-2 antigens.

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Viral Infections

Viruses are abundantly found, minute entities that have genetic material enclosed within a protein coat. The proteinaceous material enclosing the genetic material of the virus is called a capsid. The genetic material could be either DNA (deoxyribonucleic acid) or RNA (ribonucleic acid). A virus is too minute to be looked at with naked eyes and therefore visualized with the help of a microscope. They are acellular entities that require a host for processes, such as replication, transcription, translation and multiplication. Plants, animals, and bacteria act as host wherein the virus reproduce. Viruses cannot multiply outside the host's body and thus are considered nonliving outside the host body.